Hole cutting device



Feb. 8,1949. I HQQSER r AL 2,460,826

HOLE CUTTING DEVICE Filed Apri1 3, 194s 2 Sheets-Sheet 1 \\\\Ym\ w FIG. I

Ill i.

FIG. 2

HARTMAN o. HOOSER WILLIAM voMAcKA Feb. 8, 1949.. oos 2,460,826

HOLE CUTTING DEVICE Filed April 3, 1946 2 Sheets-Sheet 2 FIG. 3 FIG. 4

- HARTMAN.'D. HOOSER WILLIAM VOMAGKA Patented Feb. 8, 19 49 2,460,826 mm CUTTINGDEVICE Hartman D. timer; Big Springs, Tex, and

willi'am'v'om'acka, Unitd states Nil/V3 Application Ami 3,. 1946, Serial-No.-"659,418

(01. 33- 30) (Granted under the-act of 'March:3,.-.1;8 83, as

r Claim.

The invention relates i torai tooliparticulelrly designed for cutting 'a"'hole.l'at any angle infl'a curved'or flat surface.

An object of the invention is to-pr'ovidela tool structure of simple sturdy "construction' which will facilitate the heretofore tedious-and difficult process of cutting out I alhole in any? curved or other surface at any'desired angle as for theinsertion cfa cylindrical object' such as a 'pipe'or the like.

Another object of the invention is to provide a device which will eli'minate the necessity of layout wo'rkarid the necessity for trimming and grinding the cut to the desired angle as has been necessary prior to the present invention in a separate process, thereby materially reducing lman hours. h

A further object is the provision of such an instrument, the inherent accuracy of which guarantees a well-done job even in the hands of anovice workman.

A still further object is to provide such-aminstrument which will require-a minimumvof bperations or adjustments prior to and during Iithe use of the instrument.

Other objects and advantages will be more apparent from the following detailed description taken in connection with the accompanying drawings illustrating one embodiment of the invention, and in which:

Fig. l is an elevation of the device attached to a plate or the like for use.

Fig. 2 is an enlarged view partly in section substantially on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged View partly in section substantially on the line 3-3 of Fig. l.

Fig. 4 is an enlarged sectional view substantially on the line 4-4 of Fig. 1.

Fig. 5 is an enlarged view, partly in section, of a portion of the apparatus of Fig. 1.

Fig. 6 is a view of a detail.

Referring to the drawing, the numeral l' represents a yoke shaped bracket member adapted to be secured to the work as represented by the plate or the like A. The yoke receives a transverse pivot pin 2 adjustably mounted by threaded engagement with the yoke for clamping an eye 3a of standard member 3 in angularly adjusted position in said yoke shaped bracket. The pin 2 has an operating disc or clamping head 2a at one end thereof. The standard member 3 at its upper end is passed through a threaded sleeve 5 which in turn is received in an opening or eye 6a of a bracket 6. The sleeve 5 has a nut 4 at its opposite end for rotatably retaining said bracket --a.mended. April -30,1928;--370=-O.- G. 757) rightengles to said standard member 3.

con said sleeve. The sleeve-5 withits enlarged headorend and itsnut i provides an effective rotary" bearing: for the bracket 6. Clamping screws 26 are providedrpr'efefably extending through :the enlarged head. of the sleeve 5 for clamping the sleeve 5 to the standard 3.

:The bracket" 5 uisxpro'vided with. a second .eye orPb'ore tb eXt-endingat'right angles to the first and" receiving a transvcrsebar lfiextending' at A set screw or the like is provided for fixing the transverseharrin adjusted position transversely of said standard 3; l

. The'stran'sverse "bar '2 is provided. atsltsiouter endwith a foot nrember :la which. maysdesirab'ly have a'curved surface with fasteners lband receives and is secured by said fasteners to-fork bracket 8.

' Fork bracket B"has .slidablysreceived .inaan opening therein, a tool carrying bar Q disposedin parallelism with the standard member 3 for movement toward or away fronithexwork; s-lihe tool carrying bar 9 may desiralbiy have: a rounded surface :forslidable engagement "in asrounded openin in the fork bracket 8. 'The bar 9. de-

sirably has a flattened longitudinal surface to which is attached by screws or the like 9b, a rack member 9a. Pinion means it! and H are desirably provided in the forks of the bracket 3 and in engagement with the rack 8a, the pinion means ll desirably being provided with a crank or the like 12 for manually operating the pinion means to advance or retract the tool carrying bar 9 by means of the rack. The operating member l2 may be a crank, as shown, or may be a wheel, and may be connected with either of the pinions ID or H, as by means of a squared portion of the crank or the like received in a squared opening in the pinion. A retaining screw 13 may desirably be provided, threaded into the end of the crank [2.

The tool carrying bar 9 is provided at its end adjacent the work with a tool supporting bracket M secured thereto by means of a set screw Ma or the like, and which bracket may desirably receive an oXy-acetylene or other torch member indicated diagrammatically at it in the drawings, held in place by set screw means or the like [9.

In the operation of the device, the yoke bracket 1 is secured to the work by having its shank ll extending through a hole in the work, preferably with a nut l3 on the inner end of the shank of the bracket, and providing for rotary adjustment of the direction of said yoke bracket. Primarily, but two simple operations are required in seteting up the device. The desired insertion angle 7 for the cylinder or the like must be set up by adjusting the angle of the standard member 3, as

may be desired. This may be done by suitable .measuring means.

If desired, indicia may be provided on the yoke bracket .l and on the eye of the standard 3 for properly setting the desired insertion angle. The second operation is to set the desired radius corresponding to the radius of the cylindrical pipe or the like to be inserted in the hole, by adjusting the bar 1 through the bore 6b of bracket 6.

Once these are set the operator has only to torch in any Way due to the safe clamping means provided, except to maintain the proper tip distance, which is easily accomplished through the medium'of the small crank and associated'gearing on the mechanism. V

Bythe present invention an effective and eflicient tool is provided for cutting a rounded substantially oval or elliptical hole at any angle with V respect to the surface to be cut, providing beveled surfaces for the reception of a cylindrical.- object inserted at the desired angle into the hole in the factured and used by or for the Government of the United States of 'America for governmental purposes without the payment of any royalties thereon or therefor.

What is claimed is: a

In a hole cutting device of the class described, a standard having an eye at one end, a yoke 4 bracket receiving said eye with a pivot pin extending through said eye and mounted in said yoke bracket, said pivot pin having a clamping head engaging the yoke bracket for clamping the pivoted standard in angularly adjusted position, said yoke bracket having a stud portion provided with a nut and adapted to be adjustably secured to a work member such as a plate or the like for rotary adjustment of the direction of said yoke bracket, a sleeve on said standard, means for adjustably fixing said sleeve longitudinally onsaid standard, a rotatable bracket having an eyereceiving said sleeve, said sleeve providing a bearing for rotation of said rotatable bracket thereon, said rotatable bracket having a second eye or'bore at right angles to the first eye, a

transverse bar slidably received in said second eye or bore and being disposed at right angles to said standard, means for fixing said transverse bar in transverse adjusted position at right angles to said standard,. a fork bracket mounted at the outer end of said transverse bar, a tool-carrying bar received in said fork bracket and disposed in parallelism with said standard, said tool-carry ing bar having a rack thereon, pinion means mounted in said fork bracket in engagement with said rack, and a crank for operating said pinion means to advance or retract said'tocl-carrying bar in respect to the plate or the like, and a toolcarrying bracket mounted at the lower end of said tool-carrying bar.

HARTMAN D. HOOSER.

WILLIAM VOMACKA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 530,822 Caldwell Dec. 11, 1894 1,139,298 Keppy May 11, 1915 1,286,770 Rashkovsky Dec. 3, 1918 1,907,957 Gerber May 9, 1933 

